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| Question | Answer |
| Speed and velocity is how fast something is moving. It is measured in m/s. | The difference between the two is that velocity must be accompanied by a distance (E.g. 10 m/s north) where speed doesn't. |
| The equation to work out speed is: Speed = Distance/Time S = D/T | Alternate equations to work out distance and time are: Distance = Speed x Time (D=S x T) Time = Distance/Speed (T=D/S) |
| Acceleration is how fast the velocity/speed is changing. This is measured using: Acceleration = Change in velocity/Time | Change in velocity is calculated like so: Final velocity - initial velocity (v-u) Therefore the symbol equation for acceleration is: A= (v-u)/t |
| On Distance time graphs, Gradient = Speed. To work out the gradient, you take the no. on the vertical axis and divide it by the no. on the horizontal line. | The steeper the graph, the faster the thing in question is moving. A steeping curve means it's speeding up, while a leveling-off curve means it's slowing down. |
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